A) Use the "Scripting Language". See examples in "scripts" of your QCad installation.

B) It is planned to have a multi-line-input command line. But this does not work right now.
Then, it will be possible to enter
line 0,0
@10,0
...
from a plain text editor, to copy&past directly from an file with comments on it.

But right now, A) will be the solution.
So your script can be used by directly enter some values there, stored in a variable/array list. Or, more comfortable, to script an file-open-dialog box, then read the xy-Values in an array, to conversion (add "line", or whatever needed), etc.

(NOTE: Customer programming and specific customer support is basically not included by this low price of QCad Professional. Or made a donation so that we can support you for your application as needed.

Basically there is a fist-come first-serve. If you pay for a feature, it will be implemented first. Or if you are a VIP customer, with a 10 million dollar business critical application, please contact us.

Or if you have an superb application value and usage for the feature, that pushes QCad Prof that everybody must have and pay it...

A good starting point is for example theCadTrain.com for basic drafting with QCad Prof. (But scripting is not included there right now.)

We know AutoCAD ... and we like it ... but I found out that QCad can do many 2D things much more easier then AutoCAD... QCad is in fact easier and faster. But it is not AutoCAD... sure.

-- The drawing code crashes here. Sure you have to read the values in x and y values. Now it uses strings. But the file will be read line by line and printed out correctly.)

//// autostart.qs//// 1. Place this file into a directory location where QCad can find it//// Replace <USERNAME> with your user login name on your system.//// On a Windows XP system this will be:// C:/Documents and Settings/<USERNAME>/.qcad/autostart.qs//// On a Unix/Linux system this will be:// /home/<USERNAME>/.qcad/autostart.qs//// 2. Restart QCad and check if it loads your autostart.qs file// You should see in the command line something like this:// Running script 'C:/Documents and Settings/<USERNAME>/.qcad/autostart.qs'//// 3. Once this works, place all neede files in your autostart directory// For example demo01.qs and demo01.png.//// 4. Optionally add customized icons for your script// If your sctipt is demo01.qs then the icon will be demo01.png.// Just a normal PNG file, 16x16 pixels in size, 72 dpi.//// 5. Press the button// You should see something like this in the command line:// // Running script 'C:/Documents and Settings/<USERNAME>/.qcad/demo01.qs'////// NOTE: You can also load and run this script directly within the// scripting IDE for testing purpose.//// For more information about this file see:// http://www.ribbonsoft.com/qcad/manual_scripting/contents.html//